| Gagliano Aterno | |
| Official Name: | Comune di Gagliano Aterno |
| Coordinates: | 42.1275°N 13.7008°W |
| Province: | (AQ) |
| Area Total Km2: | 33.30 |
| Population Footnotes: | [1] |
| Population Total: | 253 |
| Population As Of: | 31 December 2013 |
| Population Demonym: | Gaglianesi |
| Elevation M: | 650 |
| Saint: | San Martino |
| Day: | 11 November |
| Postal Code: | 67020 |
| Area Code: | 0864 |
Gagliano Aterno is a town and comune approximately 45km (28miles) from Aquila in the Abruzzo region of Italy. It is located in the vicinity of an ancient pre-Roman settlement, although most of the buildings in the village are from the medieval period.